THE WHATIS.COM WORD-OF-THE-DAY October 15, 2002 firewall ______________ TODAY'S SPONSOR: Postmaster Direct
What kind of mail do you want in your e-mailbox? How about free information and offers about computers, networking, wireless devices, finance, and lots more? Choose the topics you would like to learn more about. Visit http://whatis.techtarget.com/postmasterDirect/ ______________ TODAY'S WORD: firewall See our definition with hyperlinks at http://searchsecurity.techtarget.com/sDefinition/0,,sid14_gci212125,00.html A firewall is a set of related programs, located at a network gateway server, that protects the resources of a private network from users from other networks. (The term also implies the security policy that is used with the programs.) An enterprise with an intranet that allows its workers access to the wider Internet installs a firewall to prevent outsiders from accessing its own private data resources and for controlling what outside resources its own users have access to. Basically, a firewall, working closely with a router program, examines each network packet to determine whether to forward it toward its destination. A firewall also includes or works with a proxy server that makes network requests on behalf of workstation users. A firewall is often installed in a specially designated computer separate from the rest of the network so that no incoming request can get directly at private network resources. There are a number of firewall screening methods. A simple one is to screen requests to make sure they come from acceptable (previously identified) domain name and Internet Protocol addresses. For mobile users, firewalls allow remote access in to the private network by the use of secure logon procedures and authentication certificates. A number of companies make firewall products. Features include logging and reporting, automatic alarms at given thresholds of attack, and a graphical user interface for controlling the firewall. RELATED TERMS: gateway http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212176,00.html server http://whatis.techtarget.com/definition/0,,sid9_gci212964,00.html router http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212924,00.html packet http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212736,00.html proxy server http://whatis.techtarget.com/definition/0,,sid9_gci212840,00.html Internet Protocol http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci214031,00.html ______________________ SELECTED LINKS: SearchSecurity.com provides news and links to tutorials, vendors, and other information about firewalls. http://www.searchsecurity.com/ whatis.com offers a crossword puzzle to test your knowledge about firewalls. http://whatis.techtarget.com/definition/0,,sid9_gci856796,00.html SearchNetworking.com provides links to more about firewalls in general. http://searchnetworking.techtarget.com/bestWebLinks/0,,sid7_tax38e,00.html ______________________ THIS DAY IN IT HISTORY | October 15, 1950 Aircall Incorporated, in New York City, became the first U.S. company to introduce a commercial radio paging service. The first page was sent to a doctor who was on a golf course 25 miles away. http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci212739,00.html ______________________ CROSSWORD PUZZLE #4 | Graphics Improve your flexible thinking skills. Print out the puzzle and keep it nearby to work on throughout your day! http://whatis.techtarget.com/definition/0,,sid9_gci853835,00.html ______________________ QUIZ #17 | DSL Do you know why DSL is so fast? Take our quiz and find out! http://whatis.techtarget.com/definition/0,,sid9_gci783951,00.html ______________________ REAL-LIFE CHALLENGE #17 | Why learn Linux? Bob wants to know which is the better career move -- taking the free time he has to learn Linux, or using that time to get another Microsoft certification. Can you give him some advice? http://whatis.discussions.techtarget.com/WebX?[EMAIL PROTECTED]@.1dcfae0e/141!viewtype=threadDate&skip=&expand= ______________________________ RECENT ADDITIONS AND UPDATES [1] N1 http://searchsolaris.techtarget.com/sDefinition/0,,sid12_gci854790,00.html [2] OOPSLA http://searchwebservices.techtarget.com/sDefinition/0,,sid26_gci854764,00.html [3] segmentation and reassembly http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854752,00.html [4] SIGTRAN http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854620,00.html [5] TP0-TP4 http://searchnetworking.techtarget.com/sDefinition/0,,sid7_gci854617,00.html ____________________________________________________________________ ::::::::::::::::::: WHATIS.COM CONTACTS ::::::::::::::::::: LOWELL THING, Site Editor ([EMAIL PROTECTED]) ____________________________________________________________________ MARGARET ROUSE, Associate Editor ([EMAIL PROTECTED]) ___________________________________________________________________ :::::::::::::::::::: ABOUT THIS NEWSLETTER ::::::::::::::::::::: Published by TechTarget (http://www.techtarget.com) TechTarget - The Most Targeted IT Media Copyright 2002, All Rights Reserved. If you would like to sponsor this or any TechTarget newsletter, please contact Gabrielle DeRussy at [EMAIL PROTECTED] Unsubscribe from 'Word of the Day' - Simply Reply to this Email with REMOVE within the Body or Subject > or - Go to: http://WhatIs.techtarget.com/register - Log in to edit your profile. - Click on the link to Edit email subscriptions. - Uncheck the box next to the newsletter you wish to unsubscribe from. - When finished, click "Save Changes to My Profile."
